Lightpipe



FIG. 1 is a perspective view of a lightpipe embodying the features of the design;

FIG. 2 is an opposite perspective view showing the roughened rectangular surfaces of the lightpipe thereof;

FIG. 3 is a front elevation thereof to a slightly smaller scale;

FIG. 4 is a rear elevation thereof;

FIG. 5 is a plan view; and,

FIG. 6 is a right side elevation thereof drawn to a larger scale. 

The ornamental design for a lightpipe, as shown and described. 